One significant historical parallel is this:
In the 1930's, there were quasi-fascist groups in Britain who expressed support for Hitler. Along with those street-level dissidents, some affluent--actually rich--Brits were expecting the German dictator to rise as a defender of Capitalism against the Moscow-based Bolshevism that had been arising from the Russian east. Even the once and temporary King, Edward, was thought to be sympathetic with the Nazi movement. His abdication was probably prompted by this unseemly sympathy for the Germans who had been defeated, less than twenty years earlier in the First big war.
But when Hitler upped the ante by mounting full blitzkreig war on the Czechs and the Polish, it was obviously time for the nazistic fat cats to reevaluate their opinions about the little German dictator and his Reich of thugs, theives and murderers.
Several years ago, I wrote a novel, Smoke, about this European scenario; the story, beginning on the day of coronation of King George VI, follows a young American businessman through France. It is a journey that affords the reader a glimpse into Europe as it existed in 1937. Ultimately, young Philip arrives at the Flanders Field gravesite of his father who had been a sharpshooter with the American Expeditionary Force but who never came home when that first big war ended on Nov11, 1918.
My hope is that the uglinesss of this present war in Ukraine will ultimately knock some sense into the heads of all Putin-sympathizers as the atrocities inflicted on Ukraines mount up as unquestionable crimes against humanity.
As Britain had no real use for Nazi-sympathizers when the World War II actually heated up the whole damn world, so do we in the civilized West have no use for discontented quasi-fascists who support Vlad the Mad, self-appointed Destroyer of Ukraine.